fix missing abs(byte) routine

compiler/res/prog8lib/prog8_funcs.asm

@@ -86,9 +86,9 @@ func_all_w_stack	.proc
 
 abs_b_stack	.proc
 	; -- push abs(A) on stack (as unsigned word)
-		jsr  abs_b_into_A
+		jsr  abs_b_into_AY
 		sta  P8ESTACK_LO,x
-		stz  p8ESTACK_HI,x
+		stz  P8ESTACK_HI,x
 		dex
 		rts
 		.pend

docs/source/todo.rst

@@ -4,7 +4,7 @@ TODO
 For next release
 ^^^^^^^^^^^^^^^^
 - bug: 2 repeats in same subroutine -> duplicate label error?  see repeat_bug.p8
-- bug: f_read() can't deal with running out of banked ram?
+- bug: f_read() can't deal with running out of banked ram? maybe only cx16diskio.f_read()?
 - add McCarthy evaluation to shortcircuit and/or expressions.  Both conditional expressions and assignments!
 - add some more optimizations in vmPeepholeOptimizer
 - vm Instruction needs to know what the read-registers/memory are, and what the write-register/memory is.

examples/test.p8

@@ -48,6 +48,10 @@ main  {
     sub start() {
         ubyte value
         uword wvalue
+        byte svalue = -99
+
+        wvalue = 3*abs(svalue) +abs(svalue)+abs(svalue)+abs(svalue)
+        txt.print_uw(wvalue)
 
         txt.print("short and with false (word): ")
         wvalue = funcw() and funcFalseWord() and funcw() and funcw()